Rhino is an open-source implementation of JavaScript written entirely in Java. Prior to 1.8.1, 1.7.15.1, and 1.7.14.1, when an application passed an attacker controlled float poing number into the toFixed() function, it might lead to high CPU consumption and a potential Denial of Service. Small numbers go through this call stack: NativeNumber.numTo > DToA.JS_dtostr > DToA.JS_dtoa > DToA.pow5mult where pow5mult attempts to raise 5 to a ridiculous power. This vulnerability is fixed in 1.8.1, 1.7.15.1, and 1.7.14.1.
History

Thu, 04 Dec 2025 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla rhino
Vendors & Products Mozilla
Mozilla rhino

Wed, 03 Dec 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 03 Dec 2025 19:45:00 +0000

Type Values Removed Values Added
Description Rhino is an open-source implementation of JavaScript written entirely in Java. Prior to 1.8.1, 1.7.15.1, and 1.7.14.1, when an application passed an attacker controlled float poing number into the toFixed() function, it might lead to high CPU consumption and a potential Denial of Service. Small numbers go through this call stack: NativeNumber.numTo > DToA.JS_dtostr > DToA.JS_dtoa > DToA.pow5mult where pow5mult attempts to raise 5 to a ridiculous power. This vulnerability is fixed in 1.8.1, 1.7.15.1, and 1.7.14.1.
Title Rhino vulnerable high CPU usage and potential DoS when passing specific numbers to toFixed() function
Weaknesses CWE-400
References
Metrics cvssV4_0

{'score': 5.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-12-03T19:31:54.629Z

Updated: 2025-12-03T19:43:58.830Z

Reserved: 2025-12-01T18:44:35.639Z

Link: CVE-2025-66453

cve-icon Vulnrichment

Updated: 2025-12-03T19:43:52.077Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-03T20:16:26.897

Modified: 2025-12-04T17:15:08.283

Link: CVE-2025-66453

cve-icon Redhat

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